docs: added support for tests in www workspace (#14415)

* tests for components (WIP)

* finished adding tests to components

* added tests for providers

* add test command to doc tests

* fix imports

* exclude test files

* remove import

* add vitest as dev dependency

* fix build error

* ignore test files from eslint

* fix test from docs-ui

www/vitest.config.mts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vitest/config'
+import react from '@vitejs/plugin-react'
+import tsconfigPaths from 'vite-tsconfig-paths'
+import { resolve } from 'path'
+
+export default defineConfig({
+  plugins: [tsconfigPaths(), react()],
+  test: {
+    environment: 'jsdom',
+    setupFiles: [resolve(__dirname, './vitest.setup.ts')],
+  },
+})
+